The IX (unclassified–miscellaneous) hull classification symbol is used for ships of the United States Navy that do not fit into one of the standard categories. Similar lists of 'miscellaneous' ships can found at List of auxiliaries of the United States Navy § Miscellaneous Ships (AG, T-AG) and List of yard and district craft of the United States Navy § District Auxiliary, Miscellaneous (YAG). Ship status is indicated as either currently active [A] (including ready reserve), inactive [I], or precommissioning [P]. Ships in the inactive category include only ships in the inactive reserve, ships which have been disposed from US service have no listed status. Ships in the precommissioning category include ships under construction or on order; IX ships are generally not ordered as such, but are rather converted from other roles. Historical overview These vessels usually fall into these categories: Armed decoys (Q-ships) Experimental vessels Former yachts Mobile base vessels used by service squadrons (command ships, barracks ships, bulk storage ships, unnamed barges, and floating shipyard equipment) Retired warships Training equipment and simulators (including two Great Lakes-based paddlewheel aircraft carriers) War prizes Unclassified miscellaneous vessels (IX) Annapolis (IX-1), ex-PG-10 Dispatch (IX-2), ex-Boston, protected cruiser Briarcliff (IX-3), receiving ship , ex-BM-10 Alton (IX-5), ex-CA-14, ex-CL-14 Coastal Battleship Number 4 (IX-6), ex-BB-4 Commodore (IX-7), receiving ship, armory Cumberland (IX-8), receiving ship Dubuque (IX-9), ex-AG-6, later PG-17 Essex (IX-10), ex-sloop of war, receiving ship Gopher (IX-11), ex-Fern, training ship, sank while under tow 21 September 1923 Hancock (IX-12), ex-AP-3, receiving ship Hartford (IX-13), Civil War relic Hawk (IX-14), ex-PY-2 Prairie State (IX-15), ex-BB-7 , ex-BM-9 Monadnock (IX-17), ex-BM-3 Nantucket (IX-18), ex-PG-23 Newport (IX-19), ex-PG-12 Constellation (IX-20), museum ship Constitution (IX-21) [A], later 'none' classification as museum ship still in commission Oregon (IX-22), ex-BB-3 Paducah (IX-23), ex-AG-7, later PG-18 Philadelphia (IX-24), ex-C-4 Reina Mercedes (IX-25), Spanish-American war prize Southery (IX-26) Sturgeon Bay (IX-27) Wheeling (IX-28), ex-PG-14 Wilmette (IX-29) , ex-PG-8 , ex-Michigan Yantic (IX-32) Newton (IX-33), ex-ID-4306 Henry County (IX-34) Topeka (IX-35), ex-PG-35 Light Target Number 2 (IX-36), ex-DD-136, later DMS-2, AG-19 Light Target Number 3 (IX-37), ex-DD-275 Empire State (IX-38), ex-AG-11 Seattle (IX-39), ex-CA-11 Olympia (IX-40), ex-CL-15, later museum ship America (IX-41), converted yacht Camden (IX-42), ex-AS-6 Freedom (IX-43), converted yacht Damage Control Hulk Number 1 (IX-44), ex-DD-163 Favorite (IX-45) Transfer (IX-46) Vamarie (IX-47), converted yacht Highland Light (IX-48), converted yacht Spindrift (IX-49), converted yacht Bowdoin (IX-50), converted yacht, former Arctic research vessel